Imam Maalik مالك بن أنس بن مالك بن أبي عامر · The Book of Fasting

'Abdur-Rahman bin Zaid bin Al-Khattab addressed the people on the day concerning which there was doubt (as to whether the month had begun) and said: "I sat with the Companions of the Messenger of Allah and asked them, and they a narrated that the Messenger of Allah said: 'Fast when you see it and stop fasting when you see it, and perform the rites on that basis. If it is obscured, then complete thirty days, and if two witnesses testify…

"I heard the Messenger of Allah say concerning Ramadan: 'Whoever spends its night in prayer (Qiyam) out of faith and in the hope of reward, he will be forgiven his previous sins."' '

"The Messenger of Allah went out in the middle of the night and prayed in the Masjid," and he quoted the same Hadith, in which he said: "nd he encouraged them to pray Qiyam in Ramadan, without insisting on that, and he said: 'Whoever spends the nights of Ramadan in prayer (Qiyam) out of faith and in the hope of reward, he will be forgiven his previous sins." '

"I heard the Messenger of Allah say concerning Ramadan: 'Whoeve spends its nights in prayer (Qiyam) out of faith and in the hope of reward, he will be forgiven his previous sins." '

"I heard the Messenger of Allah say: 'Fasting is a shield, so long as you do not damage it."'

"I said: 'O Prophet of Allah, I am a man who fasts continually, so should I fast while traveling?' He said: 'If you wish then fast, and if you wish then do not fast."'

"Hafsah, the wife of the Prophet said: 'There is no fast for the one who does not intend (to fast) before dawn."'

"There is no fast for the one who does not intend to fast before dawn."

"The Messenger of Allah would fast until we said he would not break his fast, and he would not fast until we said he does not want to fast. And he never fasted any month in full apart from Ramadan, from the time he came to Al-Madinah."